aventurin

aventurin (countable and uncountable, plural aventurins)

1. Alternative form of aventurine
   • 1877, Rudolf Wagner, “Division III. Technology of Glass, Ceramic Ware, Gypsum, Lime, and Mortar.”, in William Crookes, transl., A Handbook of Chemical Technology Translated and Edited from the Eighth German Edition, with Extensive Additions, New York, N.Y.: D. Appleton and Company, , →OCLC, page 291:

     Aventurin or avanturin glass was formerly made only in the Island of Murano, near Venice, but is now prepared throughout Germany, Italy, Austria, and France. It is a brown glass mass in which crystalline spangles of metallic copper according to [Friedrich] Wöhler (of protoxide of copper according to [Max Joseph] von Pettenkofer) appear dispersed. [...] The Bavarian and Bohemian glass-houses produce an aventurin glass rivalling the original.

   • 2003, “The Mineral Kingdom. Dictionary of Gems, Jewels, Precious Metals and Minerals, with Their Significance and Use in the Superstition and Folklore of All Countries”, in Cora Linn Daniels, C M Stevans, editors, Encyclopædia of Superstitions, Folklore, and the Occult Sciences of the World: , volume II, Honolulu, Hi.: University Press of the Pacific, →ISBN, page 724, column 1:

     Aventurin is also the name of a variety of quartz spangled with mica or other shiny mineral. A variety of spangled feldspar, found especially in Russia, and when polished used as a gem and highly prized, is also called Aventurin or popularly "sunstone".

Borrowed from French aventurine.

aventurin n (uncountable)

1. aventurine